package rpc

import (
	"context"
	"net/http"

	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
	"github.com/multiformats/go-multiaddr"
	mn "github.com/multiformats/go-multiaddr/net"
	"github.com/pkg/errors"
	"go.uber.org/zap"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials/insecure"
	"google.golang.org/grpc/reflection"
	"source.quilibrium.com/quilibrium/monorepo/node/keys"
	"source.quilibrium.com/quilibrium/monorepo/node/p2p"
	"source.quilibrium.com/quilibrium/monorepo/node/protobufs"
)

type RPCServer struct {
	protobufs.UnimplementedNodeServiceServer
	listenAddrGRPC string
	listenAddrHTTP string
	logger         *zap.Logger
	keyManager     keys.KeyManager
	pubSub         p2p.PubSub
}

func (r *RPCServer) GetNetworkInfo(
	ctx context.Context,
	req *protobufs.GetNetworkInfoRequest,
) (*protobufs.NetworkInfoResponse, error) {
	return r.pubSub.GetNetworkInfo(), nil
}

func NewRPCServer(
	listenAddrGRPC string,
	listenAddrHTTP string,
	logger *zap.Logger,
	keyManager keys.KeyManager,
	pubSub p2p.PubSub,
) (*RPCServer, error) {
	return &RPCServer{
		listenAddrGRPC: listenAddrGRPC,
		listenAddrHTTP: listenAddrHTTP,
		logger:         logger,
		keyManager:     keyManager,
		pubSub:         pubSub,
	}, nil
}

func (r *RPCServer) Start() error {
	s := grpc.NewServer(
		grpc.MaxRecvMsgSize(600*1024*1024),
		grpc.MaxSendMsgSize(600*1024*1024),
	)
	protobufs.RegisterNodeServiceServer(s, r)
	reflection.Register(s)

	mg, err := multiaddr.NewMultiaddr(r.listenAddrGRPC)
	if err != nil {
		return errors.Wrap(err, "start")
	}

	lis, err := mn.Listen(mg)
	if err != nil {
		return errors.Wrap(err, "start")
	}

	go func() {
		if err := s.Serve(mn.NetListener(lis)); err != nil {
			panic(err)
		}
	}()

	if r.listenAddrHTTP != "" {
		m, err := multiaddr.NewMultiaddr(r.listenAddrHTTP)
		if err != nil {
			return errors.Wrap(err, "start")
		}

		ma, err := mn.ToNetAddr(m)
		if err != nil {
			return errors.Wrap(err, "start")
		}

		mga, err := mn.ToNetAddr(mg)
		if err != nil {
			return errors.Wrap(err, "start")
		}

		go func() {
			mux := runtime.NewServeMux()
			opts := []grpc.DialOption{
				grpc.WithTransportCredentials(insecure.NewCredentials()),
				grpc.WithDefaultCallOptions(
					grpc.MaxCallRecvMsgSize(600*1024*1024),
					grpc.MaxCallSendMsgSize(600*1024*1024),
				),
			}

			if err := protobufs.RegisterNodeServiceHandlerFromEndpoint(
				context.Background(),
				mux,
				mga.String(),
				opts,
			); err != nil {
				panic(err)
			}

			if err := http.ListenAndServe(ma.String(), mux); err != nil {
				panic(err)
			}
		}()
	}

	return nil
}